Counter-flow indirect dew-point evaporative cooler

Abstract

A counter-flow indirect dew-point evaporative cooler is provided, including a plurality of working channels provided parallel to each other, where adjacent working channels are separated from each other by a partition wall; in a gas flow direction, an interior of each working channel is divided into a dry channel and a wet channel; directions of airflow in the adjacent working channels are opposite, so dry channels and wet channels in the adjacent working channels are also oppositely provided, and thus the airflow in the adjacent working channels is in a counter-flow configuration; a product air outlet is provided at a junction of the dry channel and the wet channel; air to be treated enters the wet channel along a straight line from the dry channel to become working air, and obtained product air is discharged from the product air outlet.

What is claimed is: 
     
         1 . A counter-flow indirect dew-point evaporative cooler, comprising a plurality of working channels provided parallel to each other, wherein adjacent working channels of the plurality of working channels are separated from each other by partition walls; in a gas flow direction, an interior of each of the plurality of working channels is divided into a dry channel and a wet channel; directions of airflows in the adjacent working channels of the plurality of working channels are opposite, so the dry channel and the wet channel in the adjacent working channels of the plurality of working channels are oppositely provided, and thus the airflows in the adjacent working channels of the plurality of working channels are in a counter-flow configuration; a product air outlet is provided at a junction of the dry channel and the wet channel; air to be treated enters the wet channel along a straight line from the dry channel to become working air, and obtained product air is discharged from the product air outlet;
 a bottom of each of the partition walls in the wet channel is provided with an extension, the extension extends out of the wet channel from an airflow guide member at the bottom of each of the partition walls and comes into contact with water, and thus the water is introduced to an inner wall of the wet channel from the extension;   an outermost end of the dry channel is provided with an inlet for the air to be treated, and a tail end of the wet channel is provided with an exhaust air outlet;   a case is provided;   one or more water containers are arranged to store and supply the water to the wet channel;   an air blower is arranged at the inlet for the air to be treated to input the air to be treated to the plurality of working channels;   adjacent partition walls of the partition walls are connected to each other by the airflow guide member, thus forming each of the plurality of working channels by two of the partition walls and the airflow guide member;   the water is brought to each of the partition walls of the wet channel through a clearance fit or a capillary effect between the extension and the airflow guide member at the bottom of each of the partition walls;   each of the partition walls is made of a thermally conductive material, allowing for heat transfer, but not mass transfer between the adjacent working channels of the plurality of working channels; and   each of the partition walls in the dry channel is a dry surface and needs to be kept dry; while each of the partition walls in the wet channel is a wet surface and needs to be kept wet.   
     
     
         2 . The counter-flow indirect dew-point evaporative cooler according to  claim 1 , wherein each of the partition walls of the wet channel is kept wet by spraying. 
     
     
         3 . The counter-flow indirect dew-point evaporative cooler according to  claim 1 , wherein the product air outlet is provided at the junction of the dry channel and the wet channel, the product air outlet faces only the dry channel, and thus the product air outlet is a dividing line between the dry channel and the wet channel.